<template>
  <div>
  <!-- banner顶部 -->
    <div class="message-banner" :style="cover">
    <!-- 弹幕输入框 -->
      <div class="message-container">
        <h1 class="message-title">留言板</h1>
        <div class="animated fadeInUp message-input-wrapper">
          <input v-model="messageContent" @click="show = true" @keyup.enter="addToList" placeholder="发条弹幕，见证当下" />
          <button class="ml-3 animated bounceInLeft" @click="addToList" v-show="show" >
            发送
          </button>
        </div>
      </div>
    <!-- 弹幕列表 -->
      <div class="barrage-container">
        <vue-baberrage :barrageList="barrageList">
          <template v-slot:default="slotProps">
            <span class="barrage-items">
              <img :src="slotProps.item.avatar" width="30" height="30" style="border-radius: 50%" />
              <span class="ml-2">{{ slotProps.item.nickname }}</span>
              <span class="ml-2">{{ slotProps.item.messageContent }}</span>
            </span>
          </template>
        </vue-baberrage>
      </div>
    </div>
  </div>
</template>

<script>
import {getMessageList, sendMessage} from "@/api/message";

export default {
  name: "Message",
  mounted() {
    this.listMessage()
  },
  data() {
    return {
      show:false,
      messageContent:"",
      barrageList:[]
    }
  },
  methods:{
    addToList() {
      if (this.messageContent.trim() == "") {
        this.$toast({type:"error", message:"留言不能为空"})
        return false
      }
      const userAvatar = this.$store.state.avatar
          ? this.$store.state.avatar : this.$store.state.blogInfo.websiteConfig.touristAvatar
      const userNickname = this.$store.state.nickname
          ? this.$store.state.nickname : "游客"
      var message = {
        avatar:userAvatar,
        nickname:userNickname,
        messageContent:this.messageContent,
        time:Math.floor(Math.random() * (10 - 7)) + 7
      }
      this.messageContent = ""
      sendMessage(message).then(({data}) => {
        if (data.flag) {
          this.barrageList.push(message)
          this.$toast({type:"success", message:"留言成功"})
        } else {
          this.$toast({type:"error", message:data.message})
        }
      })
    },
    listMessage(){
      getMessageList().then(({data}) => {
        if (data.flag) {
          this.barrageList = data.data
        }
      })
    }
  },
  computed:{
    cover() {
      let cover = ""
      this.$store.state.blogInfo.pageList.forEach(item => {
        if (item.pageLabel == "message") {
          cover = item.pageCover
        }
      })
      return "background: url(" + cover + ") center center / cover no-repeat"
    }
  }
}
</script>

<style scoped>
.message-banner {
  position: absolute;
  top: -60px;
  left: 0;
  right: 0;
  height: 100vh;
  background-color: #49b1f5;
  animation: header-effect 1s;
}
.message-title {
  color: #eee;
  animation: title-scale 1s;
}
.message-container {
  position: absolute;
  width: 360px;
  top: 35%;
  left: 0;
  right: 0;
  text-align: center;
  z-index: 5;
  margin: 0 auto;
  color: #fff;
}
.message-input-wrapper {
  display: flex;
  justify-content: center;
  height: 2.5rem;
  margin-top: 2rem;
}
.message-input-wrapper input {
  outline: none;
  width: 70%;
  border-radius: 20px;
  height: 100%;
  padding: 0 1.25rem;
  color: #eee;
  border: #fff 1px solid;
}
.message-input-wrapper input::-webkit-input-placeholder {
  color: #eeee;
}
.message-input-wrapper button {
  outline: none;
  border-radius: 20px;
  height: 100%;
  padding: 0 1.25rem;
  border: #fff 1px solid;
}
.barrage-container {
  position: absolute;
  top: 50px;
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(100% -50px);
  width: 100%;
}
.barrage-items {
  background: rgb(0, 0, 0, 0.7);
  border-radius: 100px;
  color: #fff;
  padding: 5px 10px 5px 5px;
  align-items: center;
  display: flex;
}
</style>
